EP2264699A3 - Device and method for postprocessing spectral values and encoder and decoder for audio signals - Google Patents

Device and method for postprocessing spectral values and encoder and decoder for audio signals Download PDF

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Publication number
EP2264699A3
EP2264699A3 EP10173938A EP10173938A EP2264699A3 EP 2264699 A3 EP2264699 A3 EP 2264699A3 EP 10173938 A EP10173938 A EP 10173938A EP 10173938 A EP10173938 A EP 10173938A EP 2264699 A3 EP2264699 A3 EP 2264699A3
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EP
European Patent Office
Prior art keywords
spectral values
spectral
blocks
sequence
postprocessed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10173938A
Other languages
German (de)
French (fr)
Other versions
EP2264699A2 (en
EP2264699B1 (en
Inventor
Ralf Geiger
Bernd Edler
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Priority to PL10173938T priority Critical patent/PL2264699T3/en
Publication of EP2264699A2 publication Critical patent/EP2264699A2/en
Publication of EP2264699A3 publication Critical patent/EP2264699A3/en
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/26—Pre-filtering or post-filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/0017—Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/26—Pre-filtering or post-filtering
    • G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Error Detection And Correction (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

For postprocessing spectral values which are based on a first transformation algorithm for converting the audio signal into a spectral representation, first a sequence of blocks of the spectral values representing a sequence of blocks of samples of the audio signal are provided. Hereupon, a weighted addition of spectral values of the sequence of blocks of spectral values is performed in order to obtain a sequence of blocks of postprocessed spectral values, wherein the combination is performed such that for calculating a postprocessed spectral value for a frequency band and a time duration a spectral value of the sequence of blocks for the frequency band and the time duration and a spectral value for another frequency band or another time duration are used, wherein the combination is further performed such that such weighting factors are used that the postprocessed spectral values are an approximation to the spectral values as they are obtained by converting the audio signal into a spectral representation using a second transformation algorithm which is different from the first transformation algorithm. The postprocessed spectral values are in particular used for a difference formation within a scalable encoder or for an addition within a scalable decoder, respectively.
EP10173938.1A 2006-11-02 2007-09-28 Device and method for postprocessing spectral values and encoder and decoder for audio signals Active EP2264699B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10173938T PL2264699T3 (en) 2006-11-02 2007-09-28 Device and method for postprocessing spectral values and encoder and decoder for audio signals

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006051673A DE102006051673A1 (en) 2006-11-02 2006-11-02 Apparatus and method for reworking spectral values and encoders and decoders for audio signals
EP07818557A EP1964111B1 (en) 2006-11-02 2007-09-28 Device and method for postprocessing spectral values and encoder and decoder for audio signals
PCT/EP2007/008477 WO2008052627A1 (en) 2006-11-02 2007-09-28 Device and method for postprocessing spectral values and encoder and decoder for audio signals

Related Parent Applications (2)

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EP07818557A Division EP1964111B1 (en) 2006-11-02 2007-09-28 Device and method for postprocessing spectral values and encoder and decoder for audio signals
EP07818557.6 Division 2007-09-28

Publications (3)

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EP2264699A2 EP2264699A2 (en) 2010-12-22
EP2264699A3 true EP2264699A3 (en) 2012-10-10
EP2264699B1 EP2264699B1 (en) 2018-12-19

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EP07818557A Active EP1964111B1 (en) 2006-11-02 2007-09-28 Device and method for postprocessing spectral values and encoder and decoder for audio signals

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Country Status (22)

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US (1) US8321207B2 (en)
EP (2) EP2264699B1 (en)
JP (1) JP5301451B2 (en)
KR (1) KR101090541B1 (en)
CN (1) CN101553870B (en)
AT (1) ATE489703T1 (en)
AU (2) AU2007315373B2 (en)
BR (1) BRPI0716308B1 (en)
CA (1) CA2668056C (en)
DE (2) DE102006051673A1 (en)
ES (2) ES2354743T3 (en)
HK (1) HK1120328A1 (en)
IL (1) IL198192A (en)
MX (1) MX2009004639A (en)
MY (2) MY181471A (en)
NO (2) NO341615B1 (en)
PL (2) PL2264699T3 (en)
PT (1) PT2264699T (en)
RU (1) RU2423740C2 (en)
TR (1) TR201903942T4 (en)
TW (1) TWI350068B (en)
WO (1) WO2008052627A1 (en)

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Also Published As

Publication number Publication date
AU2007315373A1 (en) 2008-05-08
RU2423740C2 (en) 2011-07-10
TWI350068B (en) 2011-10-01
EP1964111B1 (en) 2010-11-24
US8321207B2 (en) 2012-11-27
PL2264699T3 (en) 2019-06-28
MY181471A (en) 2020-12-22
PT2264699T (en) 2019-04-02
EP2264699A2 (en) 2010-12-22
CN101553870A (en) 2009-10-07
PL1964111T3 (en) 2011-05-31
ES2720871T3 (en) 2019-07-25
MY156427A (en) 2016-02-26
RU2009117571A (en) 2010-12-10
US20100017213A1 (en) 2010-01-21
CA2668056C (en) 2014-07-29
ATE489703T1 (en) 2010-12-15
ES2354743T3 (en) 2011-03-17
KR20090085047A (en) 2009-08-06
HK1120328A1 (en) 2009-03-27
DE102006051673A1 (en) 2008-05-15
BRPI0716308A8 (en) 2019-01-15
JP2010508550A (en) 2010-03-18
AU2007315373A8 (en) 2009-06-11
NO20092125L (en) 2009-05-29
AU2007315373B2 (en) 2011-03-17
EP2264699B1 (en) 2018-12-19
BRPI0716308B1 (en) 2020-10-06
WO2008052627A1 (en) 2008-05-08
TW200836492A (en) 2008-09-01
TR201903942T4 (en) 2019-04-22
AU2011200509B2 (en) 2011-12-08
CA2668056A1 (en) 2008-05-08
EP1964111A1 (en) 2008-09-03
NO343261B1 (en) 2019-01-14
KR101090541B1 (en) 2011-12-08
DE602007010721D1 (en) 2011-01-05
NO20171179A1 (en) 2009-05-29
AU2011200509A1 (en) 2011-03-03
BRPI0716308A2 (en) 2015-05-19
IL198192A (en) 2014-05-28
CN101553870B (en) 2012-07-18
IL198192A0 (en) 2009-12-24
NO341615B1 (en) 2017-12-11
MX2009004639A (en) 2009-06-26
JP5301451B2 (en) 2013-09-25

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